3-[(2S,3R,4S,5R,6R)-3-[(2S,3R,4R)-3,4-二羟基-4-(羟基甲基)四氢呋喃-2-基]氧基-4,5-二羟基-6-(羟基甲基)四氢吡喃-2-基]氧基-5,7-二羟基-2-(4-羟基苯基)苯并吡喃-4-酮
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